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Rat IL-12p40(Interleukin 12 p40) ELISA Kit
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ELK12013
Size： Price：
48 T $320.00
96 T $458.00
96 T*5 $1947.00
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Overview

Product name: Rat IL-12p40(Interleukin 12 p40) ELISA Kit
Reactivity: Rat
Alternative Names: IL-12B; p40; IL12B; CLMF2; NKSF2; Natural Killer Cell Stimulatory Factor 2; Cytotoxic Lymphocyte Maturation Factor 2; Interleukin 23, P40 Subunit
Assay Type: Sandwich
Sensitivity: 3.2 pg/mL
Standard: 300 pg/mL
Detection Range: 4.69-300 pg/mL
Sample Type: Serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids
Assay Length: 3.5h
Research Area: Cytokine;Infection immunity;Immune molecule;
Test principle: The test principle applied in this kit is Sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre-coated with an antibody specific to Rat IL-12p40. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Rat IL-12p40. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added, only those wells that contain Rat IL-12p40, biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450nm ± 10nm. The concentration of Rat IL-12p40 in the samples is then determined by comparing the OD of the samples to the standard curve.

Standard curve

Concentration (pg/mL) OD Corrected OD
300.00 3.167 3.107
150.00 1.849 1.789
75.00 1.264 1.204
37.50 0.713 0.653
18.75 0.387 0.327
9.38 0.217 0.157
4.69 0.157 0.097
0.00 0.060 0.000

Precision

Intra-assay Precision (Precision within an assay)：CV%<8%

Three samples of known concentration were tested twenty times on one plate to assess intra-assay precision.

Inter-assay Precision (Precision between assays)：CV%<10%

Three samples of known concentration were tested in forty separate assays to assess inter-assay precision.

Recovery

Matrices listed below were spiked with certain level of recombinant IL-12p40 and the recovery rates were calculated by comparing the measured value to the expected amount of IL-12p40 in samples.
Matrix Recovery range Average
serum(n=5) 77-85% 81%
EDTA plasma(n=5) 85-92% 89%
Heparin plasma(n=5) 93-104% 99%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of IL-12p40 and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.
Matrix 1:2 1:4 1:8 1:16
serum(n=5) 79-92% 88-99% 79-88% 88-101%
EDTA plasma(n=5) 80-86% 87-97% 78-84% 78-84%
Heparin plasma(n=5) 82-95% 79-88% 84-91% 92-100%